<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	 private $_id;
	
	public function authenticate()
	{
		
	$username=strtolower($this->username);
	$user=User::model()->find('LOWER(username)=?',array($username));
	if($user===null)
		$this->errorCode=self::ERROR_USERNAME_INVALID;
	else if(!$user->validatePassword($this->password))
		$this->errorCode=self::ERROR_PASSWORD_INVALID;
	else
		{
			$this->_id=$user->id;
			$this->username=$user->username;
			$this->errorCode=self::ERROR_NONE;
		}

			return $this->errorCode==self::ERROR_NONE;
	}
	public function getId()
{
	return $this->_id;
	
}
}